Rosa's round ray
📖 Overview
Rosa's round ray (Heliotrygon rosai), first described by Carvalho & Lovejoy, 2011 is a fish. It inhabits freshwater systems including rivers, streams, and lakes. It occurs in Tropical waters. It is broadly omnivorous, taking invertebrates, plant matter, and detritus. On the IUCN Red List, it is classified as Vulnerable.
🔬 Taxonomy
🐟 Physical Description
Can be diagnosed by its unique dorsal color pattern, composed of numerous white to creamy-white vermiculate markings over a light brown, tan or gray background color. This species is tentatively further separated from H. gomesi by presenting a slightly more slender tail width at base (5.5% DW in holotype of H. rosai vs. 4.5% DW in holotype of H. gomesi), slightly greater preorbital snout length (31% DW in holotype of H. rosai vs. 33.2% DW in holotype of H. gomesi), and smaller pectoral axil to pelvic inner length (4.6% DW in holotype of H. rosai, ranging from 1.3 to 4.9% DW in all specimens, with a mean of 3.7% DW vs. 2.1% DW in holotype of H. gomesi, and ranging from 1.0 to 3.3% DW in all specimens, with a mean of 1.9% DW) .: other; Cross section: flattened.
🌀 Behaviour
Behavioural data for Rosa's round ray is currently being reviewed.
🦐 Diet
🥚 Reproduction
🌍 Habitat & Distribution
Freshwater; benthopelagic. Tropical; 0°S - 1°S, 48°W - 49°W South America: Brazil in the upper, mid and lower Rio Amazonas basin, and probably in the lower reaches of its major tributaries.
🌿 Ecology
📐 Morphometrics
🌡️ Water Parameters & Tolerance
🛡️ Conservation Assessment
📊 Population Risk & Fisheries
👥 Community & Contribute
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